I performed a factory recall on the Tundra.
The front turn signals have been weak since day one. I will be signalling left at a 4-way stop, and even though I have the right of way, the person opposite me will just start driving forward as if they don't see my turn signal and think I'm going straight.
This has been a common complaint on the Tundra forums for trucks equipped with the LED headlights. Some people went so far as to replace their turn signals with LED bulbs, complete with resistors, for extra brightness.
Anyways, turns out Toyota acknowledged the problem, and issued a recall. The incandescent signal bulbs have two filaments, a low and a high. The turn signal harness at the bulbs was wired to use the low power filament. The fix involves removing the plug, depinning the power wire and moving it to the unused hole so it connects with the high power filament. Rather than dropping the truck off at the dealer and waiting around while they fixed it, I just did it myself. Fifteen minutes, and I was done. Easy. Now the turn signals are bright and easily visible.
First picture is after I did the left turn signal. It's brighter than the right. Second picture is with both fixed.